Internal-combustion-engine valve



ay P. KRASNO INTERNAL COMBUSTION ENGINE VALVE Filed June 15. 1925 d @w% W Patented May 31, 1927.

UNITED vs'ra'r'as 1,630,750 PATENT OFFICE.

PHILIP KRASNO, OF MILWAUKEE, WISCONSITT.

INTERNAL-COMBUSTION-ENGINE VALVE.-

Application filed June 15, 1925. .Serial No. 87,229.

ternal combustion engine valve construction which will eliminate the difficulties due to carbon and other deposits, which will accurately seat at all times and under all conditions, which will cut away any carbon that may accumulate and will find a secure seat for itself, and which will thus increase the efficiency of the engine in a marked degree.

An embodiment of the invention is shown in the accom anying drawings, in which Figure 1 1s a sectional view through a portion of an internal combustion engine.

showing one form of valve.

Figure 2 is a view from the under side of such valve showing the valve detached from the valve seats and associated arts.

Figure 3 is a view of a modified form.

Figure 4 is a view of a further modified form showing the application of the valve to old styles of engines.

Figure 5 is an enlarged sectional view through an edge of the valve.

Referring to the drawings, it will be seen that 1 indicates a portion of an engine block having a port 2 therethrough. Preferably, a hardened liner or valve seat 3 is screwed into the upper end of the port 2 and is provided with an upper flat face and with a threaded downwardly extendin sleeve 4: cooperating with a corres onding y threaded portion of the engine lock.- The valve comprises an upper disk 5 preferably integral with the valve stem 6. This disk is rovided with a downwardly turned flange 7 whose lower edge is formed like a dull chisel. It has converging sides, as shown in the drawings and a slightly rounded bottom of small area contacting with the valve seat 3. k

In operation, this valve will cut through any carbon that may collect on the valve seat and due, to the narrow contacting area, will exert a sufiiciently high pressure per unit area to effect complete and adequate sealing. It may not be found desirable to go to the exfpense of-a separate hardened valve seat 3 or the valve. In this case the valve cooperates directly with the casting 1 to close the port 2, as shown in Figure 3,

and although this construction is necessarily not as long lived as that shown in Figure 1,

it hasbeen found to give excellent results even for an extended period greatly exceeding the usual period of wear of the ordinary types of valves.

In the form shown in Figure 4, a portion of a conventional type of cylinder block is illustrated and indicated by the reference character 1". It is provided with a beveled seat 8 which received the old style of beveled valve. However, the valve 5 is made of sufficient size to, reach beyond the beveled surface 8 and to contact directly withthe casting.

It has been found from actual extended tests conducted with this type of valve thatthe efliciency of a conventionally made motor was increased in a marked degree by the insertion of the type of valve disclosed. The compression was found to be very much improved as well as the effective pressure obtained on explosion. The results were particularly noticeable even in extremelycold weather and it was found that due to the improved seating of the valves that the motor would start very much more readily even in below-zero weather, whereas the old style of motor was found extremely difficult, frequently impossible, to start.

These valves have been in successful and continuous operation for a great length of time, in daily use, and have proven very eflicient in actual use. In addition to this they have been found to outwear'the ordinary type of valve many times between grinding periods.

It has been found that valves for internal combustion engines seat with greater certainty as the area of the seat is reduced.

If the valve is beveled as to wedgein a beveled seat as in the usual construction, any carbon or foreign matter will hold the valve open and will be effective in preventing an adequate compression for theengine contrary to. the usual opinion in these matters. I have found through actual ex eriments conducted with valves of interna combustion engines that the smaller the seat surface, the more complete sealing results. 'It Is, therefore, clear that the valve forming form .of internal combustion engine valve the subject matter of this invention conforms to the theory and the actual results obtained by my experiments and operates in a manner to secure perfect sealing under all conditions.

These facts are conclusively borne out by the result of extended operation tests conducted with a motor on which these,

valves were applied, as described above.

It will-be seen, therefore, that a novel 1. A valve for an internal combustion engine, said valve comprising a stem, a disk port therein,

formed integrally with said stem and having' an vinwardly directed peripheral flange, saidflange having conver inner and outer walls and ,terminating in a relatively restricted surface, said restricted surface being rounded, whereby .it may seat upon a flat surface without cutting.

2. In an internal combustion engine the combination of a cylinder block having, a

a separate and distinct va ve seat secured within said cylinder block at said port and having a flat face, a valve comprisin a disk for controlling said port, said disk aving an. inwardly directed marginal flange having converging side walls, said flange being ada ted to contact at its outer edge with the atnface of said valve seat to seal said ort.

In testimony t at I claim the foregoin I have hereunto set my hand at Milwaukee, in the county of Milwaukee and State of Wisconsin. V

PHILIP KRASNO. 

